Answer:
Acceleration towards rear = 11

Acceleration towards direction of movement of dummy = -11

Step-by-step explanation:
Mass of dummy = 75 kg
Force acted towards rear of the car = 825 N
We have Force acting on a body = Mass of body * Acceleration of body
Substituting the given values in the above equation we will get
825 = 75 * a
a = 11

So acceleration towards rear = 11

Acceleration towards direction of movement of dummy = -11
